EP0222218B1 - Boîte en tôle - Google Patents

Boîte en tôle Download PDF

Info

Publication number
EP0222218B1
EP0222218B1 EP86114640A EP86114640A EP0222218B1 EP 0222218 B1 EP0222218 B1 EP 0222218B1 EP 86114640 A EP86114640 A EP 86114640A EP 86114640 A EP86114640 A EP 86114640A EP 0222218 B1 EP0222218 B1 EP 0222218B1
Authority
EP
European Patent Office
Prior art keywords
tongue
lines
tear
strip
tear strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86114640A
Other languages
German (de)
English (en)
Other versions
EP0222218A3 (en
EP0222218A2 (fr
Inventor
Peter Schreiber
Gianni Padovan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fael SA
Original Assignee
Fael SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fael SA filed Critical Fael SA
Priority to AT86114640T priority Critical patent/ATE59012T1/de
Publication of EP0222218A2 publication Critical patent/EP0222218A2/fr
Publication of EP0222218A3 publication Critical patent/EP0222218A3/de
Application granted granted Critical
Publication of EP0222218B1 publication Critical patent/EP0222218B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • B21D51/386—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs on the side-wall of containers

Definitions

  • the present invention relates to a tin can with a welded side pinch or overlap seam, which is provided with a circumferential tear strip formed between two essentially parallel pre-scored predetermined breaking lines; see e.g. US-A-1 568 438.
  • tin cans of this type A problem with tin cans of this type is the application of a tear strip which, despite the side weld seam, can be opened easily and securely using a key.
  • the object of the present invention is now to create a tin can with tear strips, which solves this problem in a simple manner satisfactorily while maintaining the quality of the side weld seam.
  • this solution consists in that the tongue, at least in the vicinity of the weld seam, is wider than the subsequent tear strip and that the two pre-scored breaking lines are extended into the tongue.
  • the safe execution of the welding in the area of the tongue can be guaranteed with a suitable welding current program (increased current for a limited time, i.e. in the tongue area).
  • FIG. 1 of the drawing shows a sheet metal blank 1 designed to produce a can according to the invention, in which two predetermined breaking lines 3, 4 running parallel over the entire width of the blank are pre-scored to form a later tear strip 2.
  • Such cracks preferably have a V-shaped cross section and their greatest depth lies approximately in the middle of the sheet thickness (depending on the sheet thickness).
  • the tear strip 2 formed between the predetermined breaking lines 3, 4 has, for the purpose of tearing open, a tongue 5 which is wider than the subsequent actual tear strip 2.
  • the two pre-scored breaking lines 3, 4 are extended into the tongue 5.
  • a sheet metal frame 6 (FIG. 2), formed by means of the blank 1 by welding, is used to manufacture a can (by attaching it, a base and, after filling, a lid).
  • the can is opened by means of a key (not shown), which is attached to the tongue 5, by tearing open the pre-scored tear strip 2 in a manner known per se.
  • FIG. 2 of the drawing shows a can frame 6 formed from the sheet metal blank 1 by welding a side pinch or overlap seam 7.
  • FIGS. 3 and 4 show sections through the frame wall in the area of the weld seam 7, FIG. 3 showing the very homogeneous weld in the normal overlap sector, while FIG. 4 shows the seam 7 in the sector of the tongue 5.
  • this sector there is a cold welding, since the larger resistance increases the transition resistance due to the tongue 5. Thanks to this cold welding, the can can be opened later without any problems.
  • the safe execution of the cold welding is guaranteed with a suitable welding current program, thanks to which the welding current can be increased in the sector of the tongue 5.
  • Figure 5 shows a detail of the frame 6 of Figure 2 on an enlarged scale. This shows how the weld seam 7 is broken or torn when the tongue 5 is raised for the purpose of opening the can.
  • the corresponding possible tear lines (shown in dashed lines), starting from the outer edge of the tongue 5, run through the weld seam 7 inwards and ends securely in the scored lines 3 and 4.
  • the cans designed according to the invention with a cold welding point as an opening gap can be used in the field of technical packaging, possibly also in the food sector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Laminated Bodies (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Paper (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Arc Welding In General (AREA)

Claims (1)

  1. Boîte en tôle présentant une ligne de soudure par écrasement ou à recouvrement latérale (7) et une bande de déchirage (2) entourant la boîte formée entre deux lignes de déchirage (3, 4) prégravées sensiblement parallèles, la bande débutante derrière la ligne de soudure sous forme d'une languette (5) libre, caractérisé en ce que la languette (5) présente au moins à proximité de la ligne de soudure (7) une largeur plus grande que la bande de déchirage (2) suivante et en ce que les deux lignes de déchirage prégravées (3, 4) sont prolongées jusque dans la languette (5).
EP86114640A 1985-11-04 1986-10-22 Boîte en tôle Expired - Lifetime EP0222218B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86114640T ATE59012T1 (de) 1985-11-04 1986-10-22 Blechdose.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4728/85 1985-11-04
CH4728/85A CH667819A5 (de) 1985-11-04 1985-11-04 Blechzuschnitt zur herstellung von geschweissten blechzargen fuer blechdosen.

Publications (3)

Publication Number Publication Date
EP0222218A2 EP0222218A2 (fr) 1987-05-20
EP0222218A3 EP0222218A3 (en) 1988-12-14
EP0222218B1 true EP0222218B1 (fr) 1990-12-12

Family

ID=4281470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114640A Expired - Lifetime EP0222218B1 (fr) 1985-11-04 1986-10-22 Boîte en tôle

Country Status (6)

Country Link
EP (1) EP0222218B1 (fr)
JP (1) JPS62182039A (fr)
AT (1) ATE59012T1 (fr)
CH (1) CH667819A5 (fr)
DE (1) DE3676165D1 (fr)
ES (1) ES2019867B3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE99999C (fr) *
GB191302618A (en) * 1913-01-31 1914-01-29 Allen Gardiner Ingalls Improvements in or relating to Cans or like Vessels.
US1568438A (en) * 1924-02-02 1926-01-05 Thermokept Corp Can
US2348750A (en) * 1941-10-07 1944-05-16 American Can Co Container
US3021805A (en) * 1960-01-14 1962-02-20 Continental Can Co Method of making a tear strip can body
AT245342B (de) * 1963-07-01 1966-02-25 Papier Und Blechdruckindustrie Vorrichtung zur Herstellung von Dosen

Also Published As

Publication number Publication date
ES2019867B3 (es) 1991-07-16
DE3676165D1 (de) 1991-01-24
EP0222218A3 (en) 1988-12-14
ATE59012T1 (de) 1990-12-15
EP0222218A2 (fr) 1987-05-20
CH667819A5 (de) 1988-11-15
JPS62182039A (ja) 1987-08-10

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